No
No
Repair the
connection
Yes
Yes
Yes
No
Check or replace
the PCB
Yes
No
Yes
No
Fault diagnosis and Trouble shooting guide
Drain pump error
04
Failure Checking Method
The float switch opens since
drain of condensed water is
not done
Is the drain pump
submerged in condensed
water?
Is drain pump power
connection normal?
Is internal drain hose normal?
Check or
reinstall the
drain hose
Is the float switch normal?
Is PCB output signal normal?
Check or replace the
drain pump
• Malfunction of floater switch of the
drain pump
• Malfunction of the drain pump
• Defective indoor unit PCB
Error Item
Error Display
No.
Major Error Occurrence Cause
Meaning
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